wikimedia / mediawiki

		return $this->mServer;

	}

	public function buildGroupConcatField(

		$delim, $table, $field, $conds = '', $join_conds = []

	) {

		$fld = "LISTAGG($field," . $this->addQuotes( $delim ) . ") WITHIN GROUP (ORDER BY $field)";

		return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')';

	}

	/**

	 * @param string $field Field or column to cast

		return implode( ' || ', $stringList );

	}

	public function buildGroupConcatField(

		$delimiter, $table, $field, $conds = '', $options = [], $join_conds = []

	) {

		$fld = "array_to_string(array_agg($field)," . $this->addQuotes( $delimiter ) . ')';

		return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')';

	}

	/**

	 * @param string $field Field or column to cast

		return 'CONCAT(' . implode( ',', $stringList ) . ')';

	}

	public function buildGroupConcatField(

		$delim, $table, $field, $conds = '', $join_conds = []

	) {

		$fld = "GROUP_CONCAT($field SEPARATOR " . $this->addQuotes( $delim ) . ')';

		return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')';

	}

	public function buildStringCast( $field ) {

		return $field;

		return '(' . implode( ') || (', $stringList ) . ')';

	}

	public function buildGroupConcatField(

		$delim, $table, $field, $conds = '', $join_conds = []

	) {

		$fld = "group_concat($field," . $this->addQuotes( $delim ) . ')';

		return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')';

	}

	/**

	 * @param string $oldName